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A rapid start-up method for the cultivation of granular sludge in the whole autotrophic denitrification process

A technology of full autotrophic denitrification and quick start, applied in the field of granular sludge cultivation of full autotrophic denitrification (CANON) process, which can solve problems such as filler blockage, reduction of treatment effect, system collapse, etc., and achieve the effect of easy operation

Active Publication Date: 2014-10-29
BEIJING UNIV OF TECH
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Problems solved by technology

At present, the development of CANON process biological filter column technology is relatively mature, but the existence of packing will inevitably cause clogging, which will greatly reduce the treatment effect and even lead to the collapse of the entire system
[0004] Therefore, how to solve the problem of easy clogging of the biological filter column so that the process can run stably for a long time is of great significance for the further application of the CANON process

Method used

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  • A rapid start-up method for the cultivation of granular sludge in the whole autotrophic denitrification process
  • A rapid start-up method for the cultivation of granular sludge in the whole autotrophic denitrification process
  • A rapid start-up method for the cultivation of granular sludge in the whole autotrophic denitrification process

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specific Embodiment

[0030] Inoculate CANON biological filter column backwash sludge, the inoculation sludge concentration is 2.89g / L, the total inoculation amount is about 3L, and the initial particle size of the sludge is 100-150nm. The test water is artificially distributed, and an appropriate amount of (NH 4 ) 2 SO 4 , NaHCO 3 and KH 2 PO 4configured.

[0031] The reactor is made of plexiglass column, with an inner diameter of 7mm, a total height of 1000mm, a total volume of 3.8L, and an effective volume of 3.4L. There is an aeration device at the bottom, and the aeration volume is controlled by a rotameter.

[0032] The specific operation is as follows: Influent water: the mass concentration of ammonia nitrogen is 250-340mg / L; the mass concentration of phosphate is 5-10mg / L; the mass concentration of alkalinity (as CaCO 3 Total) is 1400-2000mg / L.

[0033] Response: Continuously aerate the reactor, after the initial few days of adaptation, the initial rising flow rate is 93.59cm / h, whe...

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Abstract

The invention discloses a quick start method for cultivating granular sludge employing a completely autotrophic nitrogen removal process, and belongs to the fields of urban sewage treatment and reclamation. The completely autotrophic nitrogen removal process (CANON) started in a sequencing batch reactor comprises the following steps: firstly, inoculating a part of back-flush sludge of a CANON biologic filter, and carrying out cultivation of CANON granular sludge under the condition of limited oxygen supply. Not only can the required dissolved oxygen be supplied, but also hydraulic shear force required for forming the granules is supplied. By adopting the quick start method disclosed by the invention, a plurality of problems that the CANON process is easily blocked and the like when running on the biologic filter for a long period of time are solved; a new idea can be supplied for application of the CANON process in the aspects of high and medium-concentration ammonia nitrogen simulation wastewater by the quick start mode within a short period of time.

Description

technical field [0001] The invention belongs to the field of urban domestic sewage treatment and regeneration. Specifically, it relates to a rapid start-up method dedicated to the cultivation of granular sludge in the process of full autotrophic denitrification (CANON) under medium and high ammonia nitrogen levels. Background technique [0002] With the development of economy and society, the amount of man-made sewage has increased sharply, and the phenomenon of water pollution has become more and more serious. Nitrogen pollution is the main hazard, which makes water eutrophication and causes serious harm to human beings. At present, for the removal of nitrogen in sewage, urban sewage treatment plants mostly adopt the traditional nitrification and denitrification process, such as anaerobic-anoxic-aerobic A 2 / O process, etc. However, there are many disadvantages based on the traditional nitrification and denitrification process, such as the need to add a large amount of or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/34
Inventor 李冬苏庆岭吴青梁瑜海张肖静杨胤张翠丹范丹张玉龙周元正门绚何永平曾辉平张杰
Owner BEIJING UNIV OF TECH
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